Graphene-based nitrogen dioxide gas sensors
Graphene-based nitrogen dioxide gas sensors
- 주제(키워드) Graphene Gas sensors Nitrogen dioxide
- 발행기관 한국물리학회
- 발행년도 2010
- 총서유형 Journal
- UCI G704-001115.2010.10.4.027
- KCI ID ART001467652
- 본문언어 영어
초록/요약
In this study, we demonstrated that graphene could selectively absorb/desorb NOx molecules at room temperature. Chemical doping with NO2 molecules changed the conductivity of the graphene layers,which was quantified by monitoring the current–voltage characteristics at various NO2 gas concentrations. The adsorption rate was found to be more rapid than the desorption rate, which can be attributed to the reaction occurred on the surface of the graphene layer. The sensitivity was 9% when an ambient of 100 ppm NO2 was used. Graphene-based gas sensors showed fast response, good reversibility, selectivity and high sensitivity. Optimization of the sensor design and integration with UV-LEDs and Silicon microelectronics will open the door for the development of nano-sized gas sensors that are extremely sensitive.
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